bullfinch

noun

1. The Eurasian bullfinch (Pyrrhula pyrrhula).
2. Any of various other Old World finches in the genus Pyrrhula.
3. (UK, archaic, slang)A large, thick quickset hedge.

   “Young Hurrell turned them on the right; the officer on the polo pony and Mr. Westall, between them, dissected a "bullfinch" on the left, but the ditch and the briars took toll of the former.”

4. An obstacle for a horse, consisting of a solid fence with brush above it, through which the horse should jump.